Question

I want to compare 2 string arrays in the fastest way.
I got something like below.

Will that be the right way to do. Or is there a better way to do

            bool matching=false;
            //say templateArr is the template array and dataArr as array to be compared
            string[] templateArr = {"Dictionary_type","Translation_EN" };
            string[] dataArr = { "Dictionary_type", "Translation_EN" };

            if (templateArr.Union(dataArr).Distinct().Count() == templateArr.Count())
                matching = true;

Answer 1

To test for collection equality, you can use Enumerable.SequenceEquals as follows.

using System.Linq;

bool AreEqual()
{
    string[] templateArr = { "Dictionary_type", "Translation_EN" };
    string[] dataArr = { "Dictionary_type", "Translation_EN" };

    return templateArr.SequenceEquals(dataArr);
}

If you want to test for collection equivalence (order of elements does not matter), then you can use set-equality as follows.

bool AreEquivalent()
{
    string[] templateArr = { "Dictionary_type", "Translation_EN" };
    string[] dataArr = { "Dictionary_type", "Translation_EN" };

    return new HashSet<string>(templateArr).SetEquals(dataArr);
}

Both cases are implemented in linear time, as per the MSDN documentation.